Partially revert r26703 and omit regular code generation for implicit accessors.

runtime/vm/precompiler.cc

Index: runtime/vm/precompiler.cc
diff --git a/runtime/vm/precompiler.cc b/runtime/vm/precompiler.cc
index 9a750efd69a66a376a4bb74234b88dc95fd6af7b..9a77d4a28faa21a9d28e1d9a35d5dcd90cd228a5 100644
--- a/runtime/vm/precompiler.cc
+++ b/runtime/vm/precompiler.cc
@@ -748,6 +748,9 @@ void Precompiler::BindStaticCalls(const Function& function) {
       ASSERT(!target_code.IsFunctionCode());
       // Allocation stub or AllocateContext or AllocateArray or ...
     } else {
+      // Static calls initially call the CallStaticFunction stub because
+      // their target might not be compiled yet. After tree shaking, all
+      // static call targets are compiled.
       // Cf. runtime entry PatchStaticCall called from CallStaticFunction stub.
       ASSERT(target.HasCode());
       target_code ^= target.CurrentCode();
@@ -755,6 +758,9 @@ void Precompiler::BindStaticCalls(const Function& function) {
                                      code, target_code);
     }
   }
+
+  // We won't patch static calls anymore, so drop the static call table to save
+  // space.
   code.set_static_calls_target_table(Object::empty_array());
 }